I did not buy the rough for this gemstone as cuprian and I did not know it was cuprian until I check it out with my spectrometer. I have no idea whether the copper content effects the color of this round, but it does make it more interesting.
The posted round, without any concerns about copper, is a beautiful gemstone. It is a determined light yellow that stays yellow. And when I had to test it under the twisted florescent light in a yellowish shade, the bright yellow rays were practically blinding. It is complete eye clean and has excellent crystal, which is unusual for cuprian material from Mozambique. I should say this, that it is the case for the purples anyway. This beautiful and rare round weighs 2.67 carats.